RS232 to TTL CMOS Converter Adapter

RS232 to TTL CMOS Conversion

Conveniently convert to TTL from RS232 with this RS232 to TTL CMOS conversion adapter, it supports standard RS232 signals and does not require any additional power source once connected.

  • Provides one RS232 to TTL/CMOS adaption
  • Supports 5V and 3.3V Tolerance Signals
  • Very compact
  • Supports baud rate up to 115.2 Kbps


In stock

Volume Pricing

Units Price
1 - 4 $54.95
5 - 11 $53.30
12 - 24 $52.20
25 - 49 $51.10
50+ $49.46

Model No. US-232TTL33CON

Quick Links:


RS232 to TTL Converter for PC and Workstation

The RS232 to TTL converter can be used in CMOS conversion also for RS232 interface with TTL or CMOS voltage level. This TTL/CMOS converter is designed for PC, Workstation, thin client, or server providing instant conversion to devices needing a RS232 interface.

Connect the RS232 TTL converter directly to your PC’s female DB-9 COM port, supports standard RS232 signals TxD, RxD, RTS, CTS, and GND. The converter does not require DC power from an outside source, it is powered by the RS232 signal.

RS232 to TTL / CMOS Converter Features

  • Provides one RS232 to TTL/CMOS adaption
  • Supports 4-signal RS232 Conversion: (TxD, RxD, RTS, CTS, and GND)
  • Supports DB-9 Female (DCE) to DB9 Male (TTL/CMOS) Connector Conversion
  • Supports 5V and 3.3V Tolerance Signals
  • Signal levels are inverted by the converter similar to standard RS232 but in TTL/CMOS swing level
  • Supports baud rate up to 115.2 Kbps
  • Port-Powered, no external power required
  • No driver required fo all operating systems.

Package Contents

  • 1x RS232 to TTL / CMOS converter
  • User Manual

OS Support:

  • Windows 10, Windows 8, Windows 7, Vista, and Windows XP
  • Linux and Mac OS 10.X

Product Specifications






1 Serial Port

Screw Lock Compatible


Serial Attributes
Serial Standards


Serial Ports


OS Support

Linux, Mac OSX, Win 10, Win 7, Win 8, Win Vista, Win XP


.143 lbs


6.750 × 5.125 × 1.00 in

UPC: 045079158368

Product Documentation & Drivers

Need drawings, CAD files, or other compliance documentation? Click HERE

Reviews (0)


There are no reviews yet.

Be the first to review “RS232 to TTL CMOS Converter Adapter”

← Back

Sales Support

Technical Support


What Product Do You Need Help With?

When did you purchase this product?

Application Information.

What environment / application is your product used in? (Select all that apply)

What is Your Problem?

Volume Pricing

[contact-form-7 id="15753" title="Volume Pricing Form"]


Need help with a Coolgear product you’ve purchased? Get product support from our on-site engineers.

+1 (727) 209-1300
Mon - Fri: 9 AM - 5 PM EST


Contact our sales team for assistance before you buy a Coolgear product.

+1 (727) 209-1301
Mon - Fri: 9 AM - 5 PM EST

Quick Links

Resource Center
Find helpful links, articles, and learning resources.
Quotes & Volume Pricing
Contact our sales team for quotes or quantity pricing.
Returns & Claims
Begin the return process and fill out an RMA form.
Purchase Orders
Looking to place a purchase order? Learn how, here!